Simple x264/x265 Launcher is a lightweight front-end for the x264 H.264/AVC as well as the x265 H.265/HEVC encoder, based on the Qt toolkit. It uses the 64-Bit version of x264 with the 32-Bit version of Avisynth. That lets you use 32-Bit Avisynth plug-ins (e.g. DGDecodeNV) and still benefit from the speed improvements of 64-Bit x264. Optionally you can also use 64-Bit Avisynth, which is still considered experimental, if desired, as well as x264's built-in LAVF/FFMS input.

Includes full batch encoding support for running several encoding jobs in parallel.